mmc: dw_mmc: Fix DM 4GB TF card write data errors in RV1106

Before resetting the controller, it is necessary to increase
the delay by 1 us or wait for a slight decrease in FIFO, so
that no errors will occur during the DM 4GB TF card testing
process.

Signed-off-by: Yifeng Zhao <yifeng.zhao@rock-chips.com>
Change-Id: Ic03a4d88367e3fea00f648f4a21df1669f4f0832

drivers/mmc/host/dw_mmc.c

@@ -2230,6 +2230,7 @@ static void dw_mci_tasklet_func(unsigned long priv)
 								((fifo_count >> 17) & 0x7FF) <= RV1106_RAMDON_DATA_SIZE / 4,
 								0, 5000 * USEC_PER_MSEC))
 							data->error = -ETIMEDOUT;
+						udelay(1);
 						dw_mci_reset(host);
 					}
 					send_stop_abort(host, data);